Apparatus for raising or lowering ships&#39; boats.



No. 7ll,749. Patentedflct. 2|, I902.

A. WELIN.

APPARATUS FOR RAISING 0R LOWEBING SHIPS BOATS.

I (Application filed. Sept. 5, 1901. (No Model.) 2 Sheets-Sheet I.

W .Z I A V M QM i N0. 7ll,7i49. Patented 001:. 2|, I902.

7 A. WELIN.

APPARATUS FOR RAISING 0R LOWERING SHIPS BOATS.

gApplicaQzion filed Sept. 5, 1901.| (No Model.) 7 2 Sheets-Sheet 2.

-, GEM-M1 THE NORRIS vrrzns co. PNOTO LITHO.. wasnmm'om'm c.

UNITED I STATES AXEL WELIN, OF LONDON, ENGLAND.

APPARATUS FOR'RAISING OR LOWERING SHIDQ+-RHAJKTG SPECIFICATION formingpart of Letters Patent No.

711,749, dated October 21, 1902.

Application filed eptemher 5. 1901. Serial No..'74,412. (No model.)

To all whom it may concern.-

Be it known that I, AXEL WELIN, engineer, a subject of the King ofSweden and Norway, residing at 24 and 25 Fenchurch street, in the cityof London, England, have invented certain new and useful Improvements inApparatus for Raising or Lowering Ships Boats, of which the following isa specification.

This invention relates to davits which are so constructed that thedavits themselves can turn downward, as in the constructions when thelower end of the davit is pivoted to the deck or when the lower end isin the form of a toothed quadrant which rolls on a rack.

I-Ieretofore when the davit is lowered the boat is lowered at the sametime, and thus a greater amount of power is required to hoist the boatinboard than is required to lower it out.

The object of this invention is to some extent equalize the amount ofpower that is required to launch a boat and that required to hoist itinboard.

According to this invention the tackle is so arranged that as the davitis lowered the boat is raised relatively to the upper end of the davit,and vice versa.

The drawings illustrate difierent arrangements made in accordance withthis invention.

Figure 1 is a side elevation of a davit whose lower end is in the formof a toothed quadrant which rolls on a rack. Fig. 2 is a diagrammaticview of the same, showing the davit in two positions. Fig. 3is adiagrammatic view showing a modification in which the pin to which theend of the rope is secured is mounted on the davit.

co is the davit, having a toothed quadrant b in its lower end whichrolls on arack c.

d is the handle for actuating the worm (1, carried by the bracket e andturning in the nut a, pivoted to the davit.

The boat is attached to the lower pulley o, the upper pulley 13 beingsecured to the top of the davit. The'rope 71 is secured to the pulley pand passes around the pulley 0 to the pulley p, back to the pulley 0,then to the pulley 19, then over a pulley q, fixed to the vessel, thenover a pulley 1", carried by the davit, and is finally secured to a pin2' on the bracket 6. Thus when the davit is turned outward the pulley ris moved away from the pin i'and the pulley q, and so raises the boatrelatively to the end of the davit.

In some cases the pulley 1' may be dispensed with, the end of the ropebeing secured to a pin on the davit. This is illustrated in Fig. 3,where it will be seen that the rope h passes from the pulley 10 over thepulley q and is then secured to a pin 6, carried by the davit, thedotted lines showing the outboard position of the davit, in whichposition, it will be seen, the pin '5 draws the rope around the pulley qas the davit moves outboard.

In all the arrangements a suitable position for the pin 7; is at adistance of about onethird of the length of the davit from the deck andabove the center of rotation around which the davit turns whether thepin is on the ship or on the davit.

\Vhat I claim is 1. The combination of a davit free to turn in avertical plane, a pulley carried by its upper end, an attachment forcarrying a boat, a rope passing over the pulley and supporting theattachment, a pulley fixed to the vessel around which the rope passes,and means carried by the davit for drawing the rope over the pulleys asthe davit moves outboard.

2. The combination of a davit free to turn in a vertical plane, a pulleycarried by its upper end, another pulley to which the boat is attached,a rope passing around both of said pulleys, another pulley fixed to thevessel around which the rope passes, and means carried by the davit fordrawing the rope over the pulleys as the davit moves outboard.

3. The combination of a davit free to turn in a vertical plane, a pulleycarried by its upper end, an attachment for carrying the boat, a ropepassing over said pulley and supporting the attachment, a pulley fixedto the vessel around which the rope passes, another pnlwhich the ropepasses, another pulley fixed ley fixed to the davit, and a pin to whichthe to the davit, and a pin in the vessel to which no end of the rope issecured. the rope is secured.

4. The combination of a davit free to turn in a vertical plane, a pulleycarried by its up- I AXEL WELIN.

per end, another pulley to which the boat is Witnesses:

attached, a rope passing around both pulleys, I FREDK. WEATHERLY,

another pulleyfixed to the vessel around FRED O. HARRIS.

